Remove curl hooks from IO contrib package (open-telemetry#441)

Author: HeenaBansal20

src/Instrumentation/IO/README.md

@@ -20,8 +20,6 @@ following functions:
 - `fread`
 - `file_get_contents`
 - `file_put_contents`
-- `curl_init`
-- `curl_exec`
 - `ob_start`
 - `ob_clean`
 - `ob_flush`

src/Instrumentation/IO/src/IOInstrumentation.php

@@ -39,8 +39,6 @@ public static function register(): void
         self::_hook($instrumentation, null, 'ob_flush', 'ob_flush');
         self::_hook($instrumentation, null, 'flush', 'flush');
 
-        self::_hook($instrumentation, null, 'curl_init', 'curl_init');
-        self::_hook($instrumentation, null, 'curl_exec', 'curl_exec');
     }
 
     /**
@@ -102,10 +100,6 @@ private static function addParams(SpanBuilderInterface $builder, string $functio
             return;
         }
         switch ($function) {
-            case 'curl_init':
-                isset($params[0]) && $builder->setAttribute('code.params.uri', $params[0]);
-
-                break;
             case 'fopen':
                 $builder->setAttribute('code.params.filename', $params[0])
                     ->setAttribute('code.params.mode', $params[1]);

src/Instrumentation/IO/tests/Integration/IOInstrumentationTest.php

@@ -5,7 +5,6 @@
 namespace OpenTelemetry\Tests\Instrumentation\IO\tests\Integration;
 
 use ArrayObject;
-use CurlHandle;
 use OpenTelemetry\API\Instrumentation\Configurator;
 use OpenTelemetry\Context\ScopeInterface;
 use OpenTelemetry\SDK\Trace\ImmutableSpan;
@@ -75,17 +74,6 @@ public function test_io_calls(): void
         $this->span = $this->storage->offsetGet(4);
         $this->assertSame('fread', $this->span->getName());
 
-        $ch = curl_init('foo');
-        $this->assertInstanceOf(CurlHandle::class, $ch);
-        $this->assertCount(6, $this->storage);
-        $this->span = $this->storage->offsetGet(5);
-        $this->assertSame('curl_init', $this->span->getName());
-        $this->assertSame('foo', $this->span->getAttributes()->get('code.params.uri'));
-
-        curl_exec($ch);
-        $this->assertCount(7, $this->storage);
-        $this->span = $this->storage->offsetGet(6);
-        $this->assertSame('curl_exec', $this->span->getName());
     }
 
     public function test_output_buffer_calls(): void